@Ken **********
Live and let live OK, but there are rules, and with common sense you can understand getting to a border to get a new freebie is a loophole, and not what Thai authorities have meant with their visa system.
Of course some Thai also profit from helping "tourists" to use the loophole.
Why should Thai authorities have de duty to explain exactly how the loophole works, then even the helping Thai do not profit anymore from these people that are afraid to spend money for a proper visa.
Exploring such a loophole is OK, but don't complain that authorities don't give all details about it.
When you use the loophole, you can expect to be stopped by an immigration offer sooner or later.